Fix license header

Signed-off-by: alperozturk <alper_ozturk@proton.me>

app/src/main/res/drawable/ic_fast_forward.xml

@@ -1,3 +1,9 @@
+<!--
+  ~ Nextcloud - Android Client
+  ~
+  ~ SPDX-FileCopyrightText: 2018-2024 Google LLC
+  ~ SPDX-License-Identifier: Apache-2.0
+-->
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="24dp"
     android:height="24dp"

app/src/main/res/drawable/ic_fast_rewind.xml

@@ -1,3 +1,9 @@
+<!--
+  ~ Nextcloud - Android Client
+  ~
+  ~ SPDX-FileCopyrightText: 2018-2024 Google LLC
+  ~ SPDX-License-Identifier: Apache-2.0
+-->
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="24dp"
     android:height="24dp"

app/src/main/res/drawable/ic_pause.xml

@@ -1,3 +1,9 @@
+<!--
+  ~ Nextcloud - Android Client
+  ~
+  ~ SPDX-FileCopyrightText: 2018-2024 Google LLC
+  ~ SPDX-License-Identifier: Apache-2.0
+-->
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="24dp"
     android:height="24dp"

app/src/main/res/drawable/ic_play.xml

@@ -1,3 +1,9 @@
+<!--
+  ~ Nextcloud - Android Client
+  ~
+  ~ SPDX-FileCopyrightText: 2018-2024 Google LLC
+  ~ SPDX-License-Identifier: Apache-2.0
+-->
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="24dp"
     android:height="24dp"